Improvement in apparatus for obtaining tanning extracts



, quiringits use.

SIMON Il. KENNEDY, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND F. Gr.MACOMBER, OF SAME PLAGE.

IMPROVEMENT iN APPARATUS FOR OBTAINING TANNING EXI'RACTS.

Specification forming part of Letters Patent No. 102,832, dated May l0,1870.

To all whom it may concern:

Be it known that I, S. H. KENNEDY, of the city of New York, in thecounty of New York and State of New York, have invented an ImprovedApparatus for ExtractingTannin; and I do hereby declare that thefollowing isa full and exact description thereof, reference being had tothe accompanying drawings, forming part of this specification, and tothe letters of reference marked thereon.

The object of my invention is to procure the tannin contained in thevarious barks that grow upon the forest-trees of this country, and bymeans of a suitable apparatus to condense or concentrate the same, so asto render it capable of ready and easy transportation.

Heretofore manufacturers of leather have been compelled to freight thebarks containing tannin from the forests in their heavy and bulky stateto the taunery at great expense ot time and money.

The nature of my invention consists in the employment or use of asimple, cheap, and portable apparatus that can be readily taken into theforests where the bark grows and operated with but little skill for thepurpose of condensing the tannin extracted therefrom, so that the tanninis reduced to the consistency of cream, or even to a semi-plastic state,in which condition it may be put into suitable receptacles, and in thismanner be kept in store and sold as an article of manufacture to thosere- VVhen in this condensed state, and its use is required, it may bereduced with water to any required strength.

The apparatus consists of an evaporatingconductor, to the under side ofwhich is attached a steam-pipe, through which steam is caused to passfor the purpose of assisting the process of evaporation. Bymeans of thisconductor the liquid is conveyed in a sinuous course to an evaporatingpan or boiler, in which is a steam-chamber, and in which said boiler theliquid is condensed or evaporated to the desired consistency. In thispan or boiler is an agitator or paddle, for the purpose of keeping theliquid from settling tothe bottom.

' To enable others skilled in the art to make l and'use my invention, Iwill proceed to describe proved apparatus. Fig. II is a longitudinalsectional elevation of the same, taken from the line .fr x. Letters oflike name and kind indicate like parts in each of the gures.

A may represent the foundation or base on which my apparatus stands, andB the platform or support for the evaporating-conduotor, K

both of which may be made of any suitable form and materiahas they arenot essential to -the operation of my invention.

ing process for a longer period. To the under side ot' this conductor isrigidly tixed a pipe or tube, I), through which steam iscaused to passfor the purpose of heating the conductor and assisting the evaporation.A fresh supply of steam ris admitted into the pipeD at intervals ofabout fifty feet, induction and eduction pipes a, a. being provided foradmitting the` steam and allowing the saine to escape when partiallycondensed.

E is an evaporating pan or boiler with a double bottom, thus forming asteam-chamber, F, into which steam is admitted by the induction-pipe b,and allowed to escape by the eduction-pipe c when condensed. Within thisboiler E is a paddle or agitator, G, attached to an upright shaft, H,which is driven by a pulley, I.

The operation is simple, effectual, and easily understood. After theliquid tannin has been extracted by the ordinary process of leaching, itis pouredinto the upperend of the conductor c, steam being at the sametime admitted into the tube D. The liquid flows slowly along theconductor in a sinuous course to the pan or .boiler E, in which it iscondensed to the desired consistency.

It will be observed that the liquid is partially condensed while passingalong the conductor, before it passes into the boiler, in which theprocess is completed by means of the steam admitted into the chamber F,and that the agitator, being caused slowly to revolve, prevents theliquid from settling to the bottom. When the liquid has beensufficiently condensed it is drawn oft' by means of the pipe d, and maythen be stored in suitable vessels or receptacles for use ortransportation.

The advantages of my invention are obvious, as by it the stren gtll ofthe tannin is condensed into a. small bulk, so that it can betransported to any point where it muy be required t0" use it atbutlittlecost of transportation, and when required for use it can bediluted with Water to the desired strength.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

A condensing-tank or evaporator provided with a. steam-chamber, F, andagitator G, in combination with the auxiliary coil-pipe 0,2111constructed and arranged as herein shown and described. y

S. H. KENNEDY.

Witnesses:

J EssE HOWARD Lem), JOSEPH N. COADY.

